Synthesis and characterization of composites of mixed oxides of iron and neodymium in polymer matrix of aniline-formaldehyde

Abstract

Nanocomposites of mixed oxides of iron and neodymium in polymer matrix of anilineformaldehyde are reported. The composites have been obtained by treating the aqueous solution of aniline, hydrochloric acid and formaldehyde with halide of iron and neodymium oxide. The infra-red spectra show broad peaks at ~ 590 cm -1 and at ~ 610 cm -1 due to the presence of oxides of both iron and neodymium. In heated samples, the absorption peaks due to metal oxides are better resolved. A broad and strong peak in XRD spectra at 2θ value of 35⋅69920 corresponds to spinel γ-Fe 2 O 3 . 57 Fe Mössbauer spectrum for unheated sample gives Mössbauer parameters, i.e. isomer shift (δ ), quadrupole splitting (ΔE) and effective magnetic field (H eff ). Transmission electron microscopy (TEM) micrographs reveal well dispersed particles at different magnifications. Vibrating sample magnetometry (VSM) studies indicate that the ferrite nanoparticles exhibit characteristics of ferromagnetism.

Synthesis, characterization, magnetic properties and gas sensing applications of ZnxCu1−xFe2O4 (0.0≤x≤0.8) nanocomposites

“…Extrapolation of linear regions of these plots along the X-axis gives the corresponding direct band gaps. 4 . It is obvious that the values of direct band gap (E g ) increases with increase in zinc content.…”

“…are interesting materials due to their potential applications in modern technology because of their electronic, magnetic, electrical and catalytic properties; all of these properties are completely different from those of their bulk materials [1][2][3][4]. In addition spinel-type oxides are an alternative for inexpensive and robust detection systems because of their good chemical and thermal stability under operating conditions [5,6].…”